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Abstract. This chapter discusses sustainability issues related to two mining companies – JSC "Apatit" and JSC "North-Western Phosphorous Company" – in the …
Geomechanical Modeling of Deep-Level Mining under Difficult Geological and Geodynamic Conditions. I E Semenova. I M Avetisyan. A V Zemtsovsky. Request …
During 2022, discussions amongst mining executives have continued to focus on emerging economies. It was in September of this year that EY Global (Ernst and Young) published an important report: "Top 10 business risks and opportunities for mining and metals in 2023." Their experts concluded that "ESG still tops the agenda for mining …
However, the phosphorus in sewage sludge ash is not readily bioavailable, and leaching methods introduce issues related to the disposal of acidic or alkaline waste solutions. Additionally, separating heavy metals from phosphorus in incineration ash is a significant challenge. (Fang et al., 2018, Wang et al., 2021).
Thus, based on biomass characteristics and HTT parameters, Random Forest (RF) and Gradient Boosting Regression machine learning (ML) models were constructed to predict HTT P migration between total P in hydrochar (TP_HC) and process water (TP_PW) and hydrochar P transformation among inorganic P (IP_HC), organic P (OP_HC), non …
Open-pit mining: Most apatite deposits are mined using open-pit methods, where overburden is removed to expose the ore. Rock fragmentation using drills and explosives aids in extraction. Underground mining: Deeper or more challenging deposits may require underground mining, involving tunneling to access the ore. ...
The ability to mine for both phosphate and REE enables a more cost efficient mining practice. There are two processes of REE enrichment within apatite, ... [91], in …
UNDERMINED ROCK FAILURE IN APATITE MINES IN KHIBINY: TOPICAL PROBLEMS 1011 JOURNAL OF MINING SCIENCE Vol. 58 No. 6 2022 Fig. 1. Stresses σmin (MPA) …
Apatite is widely employed in low-temperature thermochronology studies with the apatite fission track and apatite (U–Th)/He thermochronometers yielding thermal history information in the 60 - 120 °C (Laslett et al., 1987) and 55–80 °C (Farley, 2000) temperature windows respectively.Apatite has also been employed in high-temperature …
However, the phosphorus in sewage sludge ash is not readily bioavailable, and leaching methods introduce issues related to the disposal of acidic or alkaline waste solutions. Additionally, separating heavy metals from phosphorus in incineration ash is a significant challenge. (Fang et al., 2018, Wang et al., 2021). Therefore, it is essential to ...
This chapter discusses sustainability issues related to two mining companies – JSC "Apatit" and JSC "North-Western Phosphorous Company" – in the towns of Kirovsk and Apatity in the Murmansk region of Russia. ... Insights about social values were also mapped at a stakeholder meeting with Kirovsk residents at the Apatite Mining ...
Geological setting and mineral composition of (apatite)-nepheline-titanite ore from the Khibiny massif enable selective mining of titanite ore, and its processing with sulfuric-acid method, without …
Table 2 and Fig. 1, Fig. 2 represented the results of mineralogical studies using MLA, it has been shown that the primary minerals in the sample are apatite and nepheline, the content of which 30.67 and of 30.88% respectively; in the secondary presented pyroxenes, mica, feldspar, as well as natrolite and kaolinite. The most …
Confirmed Deposits. Uganda's mineral resources such as gold, copper, iron, 3Ts and an assortment of development minerals such as apatite, commercial beryl, emerald and aquamarine have attracted an increased …
The article describes the experience in which the argumented parameters of the sublevel caving system in the conditions of mining operations take into account the Khibiny apatite-nepheline deposits.
Specificity of using information technologies to improve safety and efficiency of integrated mineral mining is described. The results of works on creation of information resources for keeping and processing of data on rare earth and rare metal raw materials are presented. The application of the integrated approach to mineral mining under …
The Maine Feldspar Co. leased the area in 1902 which resulted in the largest commercial mining excavation at Mount Apatite. Feldspar was mined chiefly for the china and porcelain industry and was first transported to Topsham and later two miles south to their processing plant, established in 1906, at Littlefield Station.
The depth of mining at the apatite–nepheline deposits in the Khibiny area reaches 1000 m. the increased rate of mining while the thickness of ore bodies decreases necessitates striking new ore strata and prompts acceleration of depthward advance of …
Pulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA Dimensions: 8 mm x 4 mm x 4 mm A superb violet coloured gemmy Apatite from Maine, USA. Though very small, this is an exquisite crystal with wonderful colour, excellent lustre and a well formed crystal shape. Size: 8mm x …
Dust was a common air quality problem throughout all mining activities; fluoride emissions and radon gas emission were also serious problems. ... Apatite is commonly very insoluble in its original state as extracted from the earth and is practically unavailable as a plant phosphorus source. 7 For this reason, drastic chemical processing with ...
At around noon Thursday, a problem was reported with the elevator, which prompted the rescue attempt, officials said. Initially, 11 people, including two children, were on the elevator, according ...
Lack of selectivity in mixed mineral flocculation can be attributed to one or more of the following factors: dissolved ion interference, heterocoagulation, mechanical entrapment in flocs, and entrainment of fines between flocs. In a study of the apatite-dolomite system, it was determined that dissolved ions do not have a significant effect on selectivity. …
They acknowledge problems and risks inherent to the mining activity and seek to adopt new approaches for the mining value chain based on better practices and more ethical underpinnings (Mudd, 2020 ...
Physical Properties. Apatite is best known for its use as an index mineral with a hardness of 5 in the Mohs Hardness Scale. It is usually green in color, but can be yellow, brown, blue, purple, pink, or colorless. These …
Amidst the extraction and processing of apatite minerals lies a profound concern for the environmental impacts stemming from these practices. Delving into the crux of mining and processing, it becomes evident that the interplay between economic benefits and ecological repercussions prompts a critical examination of sustainability measures …
Sedimentary rock-type apatite ore is usually rich in phosphorus elements, exists in the form of calcium phosphate, and is an important phosphate fertilizer raw material, widely used in agriculture. Therefore, the exploitation and utilization of apatite is crucial for global agriculture and food production. However, the issue of limitation and …
Request PDF | On Mar 14, 2023, I. E. Semenova and others published Undermined Rock Failure in Apatite Mines in Khibiny: Topical Problems | Find, read and cite all the research you need on ResearchGate
Geological setting and mineral composition of (apatite)-nepheline-titanite ore from the Khibiny massif enable selective mining of titanite ore, and its processing with sulfuric-acid method, without preliminary concentration in flotation cells. In this process flow diagram, titanite losses are reduced by an order of magnitude in comparison with a …
the environmental situation caused by the mining and mineral processing in the mining regions, as well as the environmental consequences of accumulated mining and industrial waste are presented. The results of environmental moni-toring of the Russian industrial cities are demonstrated. Keywords: Environmental safety Mining Man-made waste
Table 2 and Fig. 1, Fig. 2 represented the results of mineralogical studies using MLA, it has been shown that the primary minerals in the sample are apatite and …
From Figure 2, we conclude that with the increasing of training scales, the coverage of parameters grows.But there are some words with probabilities of zero in the parameter estimation. We use query logs to train the n-gram model; there are 14.7% queries for trigram and 2.2% queries for bigram without occurring in the training, …
Blue Apatite Physical Healing Energy. Blue Apatite encourages the formation of new cells and aids in the absorption of calcium. It helps heal bones and teeth, repairs cartilage, and is useful in the treatments for rickets, …
